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US 2017/0361266 A1Published application
Method for Energy Efficient Recovery of Carbon Dioxide from an Absorbent and a Plant Suitable for Operating the Method
AssigneeUnion Engineering A/S
InventorsRasmus Find, Jan Flensted Poulsen
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Abstract
The present invention relates to a method for recovering acid gas from an absorbent rich on gaseous acid gas, in which the energy used for separation of absorbent and acid in a stripping column is reduced by recycling heat transfer fluid from the stripper off gas in an energy efficient manner. The invention further relates to a plant suitable for carrying out said method.
Claims26
A method for recovering an acid gas from a liquid acid gas-rich absorbent (L1) comprising the steps of:
- a. Providing the liquid acid gas-rich absorbent stream (L1) having absorbed acid gas therein,
- b. separating acid gas from the acid gas-rich absorbent stream (L1) in a stripping column (A2) using a gaseous stripping medium (G2) in order to provide a acid gas-containing gas stream (G1) and a liquid acid gas-lean absorbent stream (L2),
- c. transferring heat from the acid gas-containing gas stream (G1) to a stream of heat transfer fluid (L4) in order to provide a cooled acid gas-containing stream (G3) and a heated stream (L4′),
- d. separating the heated stream (L4′) into a recovered stripping medium (G4) and a liquid hear carrier (L5), and
- e. providing the recovered stripping medium (G4) directly or indirectly to the stripping column (A2).
2 more elements
Dependencies are inferred from the claim text.